package com.geh.learn.util;


import javax.annotation.Nullable;

public class AtNullalble {
    public static void main(String[] args) {
        Integer a = null;
        // testNull(a);
        testAtNull(a);
    }

    private static void testNull(int a) {
        System.out.println(a);
    }

    private static void testAtNull(@Nullable int a) {
        System.out.println(a);
    }
}
